"What does "almost certainly" mean?"
It means that no group of private investors is dumb enough to sink 7 billion dollars or so into highway without some assurance that the next (or future governor) won't expand parallel roads (or highways), just to wipe out that investment. It's also called monopoly protection.
But then you already know that.
Instead, there is certainty that there is a non-compete clause.
Since we have the internet now, we don't have to listen to the mis-info, exaggerations, and outright lies anymore.
Its real easy. First we go to Google, then to sdvanced search. In the "with all the words" box we type Cintra. In the "with the exact phrase" box we type non compete clause. Tho not neccessary, we can type BobL into the "without the words" box and our results won't be cluttered with all the mis-info posts you have made at FR and other websites.
Then, with a little click of the mouse on search, we are on our way. And what do we find?